Geomancer

[Archwizard]

snip

Fair with regards to SCH/AST, I'm just noting that it would be fitting for SCH since the building blocks are already in place. Selene doesn't do anything that couldn't be handled with Egi Glamour, and SCH's healing falls behind the others – healing through Living Dead is near impossible for them – in no small part because of the limits of their shield-focused heals. As Seiki said, NoctSect is on its last legs for AST regardless; it's not simply about taking one away to give to another job, it's about killing two birds with one stone, trimming excess from AST and refocusing SCH using a similar principle. (Though I wouldn't completely compare the idea to Sects, since what I had in mind would include allowing you to toggle Shielding vs Direct Healing in-combat based on your immediate needs while still emphasizing SCH's unique barrier spells, instead of creating a Flex Healer like AST.)
As for Necromancer... I'm not dogmatically attached to it, and I would be happy with any healer that offers unique mechanics. A dark-oriented healer just happens to fit the slot perfectly and "necromancer" has a strong theme to build around. I wouldn't be so against suggestions like Chemist if anyone could convince me it could be unique outside of "throws potions".

I agree that a push to GCD heals would require changing a lot, but at the same time, most of the healing community agrees that a lot needs to change anyway; too many tools for too situational use.

But I digress.

With only three full casters, there's loads of untapped potential for rotations, so GEO gets a lot of leeway. Plus the only other full job with water attacks is NIN, weirdly enough.